<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>02_项目排布</title>
    <style>
        .box {
            height: 400px;
            background-color: lightgoldenrodyellow;
            display: flex;
            /*子元素在主轴的排布方式*/
            justify-content: flex-start;/* 主轴起点对齐*/
            justify-content: flex-end;/* 主轴终点对齐*/
            justify-content: center;/* 主轴居中对齐*/
            justify-content: space-between;/* 主轴两端对齐：首尾元素贴边，剩余空间均分*/
            justify-content: space-around;/* 主轴环绕对齐：每个元素左右两侧的间距都是a*/
            justify-content: space-evenly;/* 主轴公平对齐：所有间隙等分*/

            /*交叉轴：永远垂直于主轴的轴，此属性控制元素在交叉轴上的排布方式*/
            align-items: flex-start;/* 交叉轴起点对齐*/
            align-items: flex-end;/* 交叉轴终点对齐*/
            align-items: center;/* 交叉轴居中对齐*/
        }
        .item1 {
            width: 100px;
            height: 100px;
            border: 2px solid red;
            background-color: pink;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="item1">1</div>
        <div class="item1">2</div>
        <div class="item1">3</div>
        <div class="item1">4</div>
        <div class="item1">5</div>
    </div>
</body>
</html>